CONTREX CXB2040 - Manual (Page 39)

CXB1525 and CXB2040 MANUAL
8900 Zachary Lane N., Maple Grove, MN 55369 U.S.A. 36
PROCEDURE:
All adjustments are made to the 8000-14 Sine/Resolver pre-amp. Refer to Appendix B, drawings
8000-1430 and 8000-1431.
1. Connect and configure the amplifier as described in the installation section. Do not apply power yet.
2. Loosen the resolver mounting-screws just enough to allow the resolver to be adjusted.
3. Note the positions of S3-1, S3-2, S3-3 and S3-4, then set S3-1, S3-2, S3-3 and S3-4 for index (i.e. S3-
1:ON, S3-2:OFF, S3-3:OFF and S3-4:OFF).
4. Make sure the amplifier is in current mode (S1-7:OFF and S1-8:ON), and set S1-4
to the ‘ON’ position.
5. Apply power. Adjust the motor shaft until the red index LED lights.
6. Slowly apply signal input voltage SIGNAL 1+ and SIGNAL 1- (J1-1 & J1-2) for differential input or
SIGNAL 2+ and COMMON (J1-3 & J1-4) for single-ended input until the motor shaft becomes reasonably
"stiff" (then it can not be easily adjusted). Use Caution! This procedure is applying continuous current to
the motor. An excessive CW setting may result in motor damage! The motor will rotate to the correct index
position. The amount of rotation will be proportional to the alignment error.
7. Slowly rotate the resolver CW or CCW until the index LED is constantly illuminated. Tighten the resolver
mounting screws, the LED should still be on.
8. Turn the power off.
9. Restore dip-switches (S3-1, S3-2, S3-3 and S3-4) for the number of poles for the motor being used. Set S1-
4: OFF. If the amplifier is to be operated in velocity mode, then set S1-7:ON and S1-8:OFF.
10. Turn the power back on and apply a signal input command while monitoring the DC voltage
at the tach. out (J1-5) with a digital voltmeter and record this voltage. Now reverse the
polarity of the signal input command and record this voltage.
NOTE: Be sure to set the tach. out voltage for 1000 RPM (12-14 bit resolution)
11. If the difference between both of the above readings is less than 100mV, the motor
is ready to operate. However, if the difference is greater than 100mV, proceed to step12.
12. Loosen the resolver mounting screws.
13. Alternately apply a positive and negative signal input command while monitoring
the tach. out voltage at J1-5.
14. Rotate the resolver body slowly back and forth until the difference between both tach.
out voltage readings is less than 100mV.
15. Tighten the resolver mounting screws and turn the power off.
16. Resolver alignment complete.